Automobile turntable



Dec. 39, 1924. 1,520,715

R. B. ISEMAN AUTOMOBILE TURNTABLE Filed Aug. 1, 1923 3 Sheets-Sheet 1 Q5 INVENTOR E Dec. 30, 1924. 1,520,715

R. B. ISEMAN AUTOMOBILE TURNTABLE Filed Aug. 1, 1925 3 Sheets-Sheet 5 q INVENTOR may Patented Dec. 36, 1924.

tJNlTEi) STATES PATENT OFFICE.

RICHARD B. ISEMIAN, F CLARION, PENNSYLVANIA, ASSIGNOR, BY IVIESNE ASSIGN- MENTS, TO AUTO TURN COMPANY, OF CLARION, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

AUTOMOBILE TURNTABLE.

Application filed August 31. 1923.

To (ZZZ whom it may; concern:

Be it known that I, RICHARD .B. ISEMAN, a citizen of the United States, residing at Clarion, in the county of Clarion and State of Pennsylvania. have invented certain new and useful Improvements in Automobile Turntables, of which the following is a specification.

My invention relates to automobile turntables of the traveling type, and particularly to devices of this type which comprise a truck having mobility wheels, and a turret mounted to revolve on the truck and provided with means for supporting an automobile.

One feature of my invention is the pro vision of braking means for the mobility wheels controlled automatically by the position of the turret with respect to the truck.

Another feature of my invention is the provision of braking means for the turret controlled automatically by an automobile running onto or off from the turret.

I will describe one form of turntable embod-' ing my invention, and will then pointout the novel features thereof in claims.

In the accompanying drawings, Fig. 1 is a top plan view, partly sectioned, showing one form of turntable embodying my inven tion. Fig. 2 is a sectional view on the line IIII of Fig. 1. Fig. 3 is in part a Side elevation of the turntable shown in Fig. 1, and in part a sectional view on the line III-III of Fig. 1. Fig. 4: is a plan view showing the turret brake mechanism E of Fig. 1 on a larger scale. Fig. 5 is a sectional view on the line V-V of Fig. 4. Fig. 6 is a sectional view on the line VIVI of Fig. at. Fig. 7 is a side View of the clamping wing 26 and spring 30 shown in Figs. 1 and? Fig. 8 is a side view showing a portion of the mechanism shown in Figs. 1 and 3 for control ing the truck brake. Fig. 9 is an enlarged plan view of the devices on carrier 13 for controlling the looking of the turret. Fig. 10 1s a fragmental top plan view of the turret B showing an indicator for the turretbrake.

Similar reference characters refer to similar parts in each of the several views.

Referring to the drawings, the turntable comprises a truck A. provided with mobility wheels 6 adapted to run on a track C or on the floor of the garage according de- Serial No. 660,376.

sired, and a turret B mounted to revolve on rollers 17 carried by the truck and provided with carriers 13 and 13 adapted to support the wheels of an automobile.

The truck A comprises a ring-like member 2 having a plurality of radial spokes 58. The member 2 is provided with four bosses 4 carrying roller bearings 10 in which are journalled two axles 5 to which the mobility wheels 6 are attached. The ring-like member 2 also carries a plurality of studs 66 projecting radially therefrom, and each stud is provided with a ball bearing which supports one of the rollers 17; These rollers are conical in shape. and they co-act with a conically formed track 24 on the under surface of the turret B, as shown in Fig. 2.

The elements thus far referred to are fully described and claimed in a co-pending application for Letters Patent of the United States, Serial. No. 660,375, filed on the thirty-first day of August, 1923, by Roy 0. Diifenderfer and Carl T. Allme. Inasmuch as these elements form no part of my present invention, I will not describe them in detail herein.

The braking of the mobility wheels 6 is accomplished by two braking devices D and D, one on each axle 5. Each of these braking devices is of the well known automobile type comprising a drum fixed to the axle 5, a brake band 59 surrounding the drum, and a rod 22 for tightening the band on the drum. The rod 22 is controlled by a cam 7 fixed to the turret B and co-acting with a roller 8 carried by a lever 9 which is pivotally mounted intermediate its ends in a bracket 12 attached to one of the spokes 58 of the truck A. The other end of the lever 9 is pivotally connected with one end of a link 11, the other end of which link is pivotally connected with a crank 18 journalled in a bracket 16 fixed to the truck A. The crank 18 is likewise pivotally connected to a vertically disposed link 19, which in turn is connected with a crank 20 mounted to swing in a bracket 21 attached to the underside of the truck A. The lower end of the crank 20 is pivotally connected with the rod 22.

A second crank 20 is similarly mounted in a bracket 21 secured to the underside of the truck A, and the upper end of this crank spring 23, one

is also pivotally connected with the vertical link 19. The lower end of the crank 20 is connected with a rod 22 which controls the braking device D. The device D 'is similar to the device 1) described hereinswungto such position that roller 8 is in engagement with the cam the link 11 .is

pulled outwardly from the center of the 'truck,-the link 19 is raised vertically the rods 22 and-'22 are pulled radially toward the center of the truck, so'that the brakes areapplied-and the turntable is locked in the positien in which it then occupies.

In the arrangement shown in Fig. 1 of the accompanying drawings, the turretis provided with two cams 7 which are so located thatthe brakes are applied when the-turret is-vin suchposition that the carriers 13 are parallelwiththe track rails C. it is understood, however, that any number and any arrangement of cams may be provided on the turret B so that the turntable will be locked in any desired position or positions of theturret with respect to the truck, and so with-respect to the track rails C.

The braking of the turret B with respect tothe tr-uck'is accomplished by two braking devices E and E controlled respectively by two treadles 31and 31 located at the diagonally opposite outer ends of the two carriers 13 and 13*, respectively, as shown in Fig. '1-

Thetreadle'Sl is pivotally mounted on two pins '27 and 27 supported in lug 61 and bracket 62'on the carrier 13 and normally occupying the elevated position in which it is-shown in Fig. 3. The treadle is restrained till from further upward movement from this position by a heel 60 which engages the upper surface of'the carrier 13. Pivotally attached to the treadle .31 is a rod 32 which extendsbehind the carrier 13 to the braking device E where it is connected with an intermediate point in a lever 33 pivotally i-nounted .at one end in a bracket 34 at tached to a wall 14: of the turret B.. The free, end of lever 33 is connected with one end of a link-35 the other end of which is bifurcated and carries a pin 53 on which a pawl 48 is pivotally mounted. Also pivotally mounted on the pin 53 are two links 63 truck A.

which are journalled freely ona :shaft 50, whereby the pawl 48 is constrained to swing around this shaft as a center. As best shown in Fig. 5, the shaft 50 is journalled in the top plate (i l of the turret B and also in a bracket 38 which is attached to'the vertical side member 14 of this turret, so that the shaft 50 is vertically disposed and is free to oscillate. Fixed to the shaft 50 beneath the bracket 33 is an arm 52 which is connected with one end of a spring 36; theother end of this spring is connected with a bracket attached to the vertical plat-e 14 ofitheturret. The spring 36 biases the1pawl48,the link 35, the-lever 33, and the rod 32to the positions in which theseparts are shown in Fig. .4:.

Also fixed to the shaft 50 :is a ratchet wheel t? which coacts with the pawl 48,?this pawl being biased intopositioufonengage-' ment with the ratchet wheelb-y a-spring49 supported on one of the links 63.

Also fixed to the shaft 50 is .a wheel .37 liming two cams 37 diametrically-disposed and arranged for coaction with a lever-.39. As shown in Figs. 4: and 6, this lever is mounted to oscillate ona pin .55,=which is supported in the top plate 64 ofthet-urret B, and also in a bracket 56' fixed tea-vertical web 57 of this turret. a pin 54 which controls brake'shoe' idprovided with a braking surfacetl), which surface is arranged to enact withthe outergperiphery of the ring-shaped meinber QwOf the The mechanism for controlling the brake shoe a Oby the pinfit wilhbe-explained hereinafter, it being" suflicient at thispoint to state that whenzthe lever 39 is not acted uponb-y either of the cams-37 the brake shoe is released fromthe truck, but'that when the-lever is SWHIlglIl-tGlOCkwise direction, as viewed in Fig.'4;,ibyr.either of the cams 37, the brakeshoe'tO isiforced 'into engagement with the-truck A. -To :in

sure therelease of the brake shoe40" when the lever 39 is released by the cam wheel37 I provide the lever 39 with an arr-n41, which arm is biased in counter-clockwise direction, asviewed in Fig. 4, by aspringQ, the other end of which is anchored on the wallofi turret "B.

In order to prevent backward rotation of the ratchet wheel #17, I preferably provide an additional-pawl 51 pivotally attached to :the

bracket 38 and arranged to permit rotation of the ratchet wheel in counter clockwise direction by pawl 48, but to positively prevent rotation of this wheel'in theotherdirection.

The operation of the turretbrake is as follows:

Normally the treadle' 31 is held in the elevated position by the action of -springi36, so that all parts ofthe'brake are in the-post tions shown in the drawings. When an au- The :lev er 39. carries lit) (i ll tomobile rolls onto the carriers 13 and 13% the first wheel depresses the treadle 31, thereby pulling the rod 32 outwardly so that the pawl 48 causes a quarter turn of the ratchet wheel 47, the shaft 50, and the cam wheel 37. This quarter turn brings one of the cams 37* into engagement with the lever 39, so that the brake shoe 40 is forced into engagement with the truck A, and so the turret is locked with respect to the truck. As soon as the first wheel leaves the treadle 31, the rod 32, lever 33, link and pawl 48 return to their normal positions, but the shaft 50 and cam wheel 3? remain station ary, so that the brake is not released. V/ hen the rear wheel of the automobile depresses the trea-dle 31, the operation repeated, that is, the cam wheel 37 makes another quarter turn so that it releases the lever 39 and the brake shoe is then released from the truck A by the action of spring \Vhen an automobile rolls off from the turret, the operation is repeated, that is, the first wheel which engages the treadle 31 causes a quarter turn of the cam wheel I}? and so causes the brake to be applied, whereas the second wheel which 01 gages the treadle causes another quarter iii A of the cam wheel 37 and so causes the brake to be released.

The braking device E is controlled by treadle 31 in exactly the saine manner as device E is controlled by treadle 31. it will be seen, therefore, that when an automobile rolls onto the turret from either end, the turret will be loclred with respect to the truck by the first right-hand wheel of the automobile and will be released by the second right-hand wheel.

Each end of each carrier 13 and 13 is provided with a clamping wing 26 which is pivotally mounted on the pins 27 and 52 W and is biased to the position shown in Fig. 3 by a spring 30 anchored on the carrier 13. In this position the wing is free from the floor. The swinging movement of the wing 26 with respect to the carrier 13 is guided by a rod 28 fined to the carrier 13 and co-acting with a slot 29 in the wing 26. WVhen an automobile rolls onto the carriers 13 and 13*, each wheel depresses the corresponding wing 26 against the action of the spring 30, so that this wing then rests on the floor and so serves to prevent the turret from revolving on the truck until the treadle 31 is operated to apply the brake. When the automobile rides off from the carrier, this wing 26 likewise serves to lock the turret after trea'dle 31 has been released and until the automobile wheel is entirely clear of the carrier.

Referring now to Figs. 4-. and 6,the mechanism for operating brake shoe 41.0, is as follows:

This brake shoe is provided with two wings 40, as shown in Fig. 6, and is further provided with a stem projecting outwardlv from the inner surface of the shoe. The operates in slots 5% in the two wings ..e brake shoe and the crank 39 is provided with stem 4:6 projecting inwardly toward the stem l-5. interposed between the crank 39/ and the shoe i0 is a spring which surrounds both of the stems d5 4-3, and so is guided by these stems. lii ien tnc crank 39 is swung into brakeapplying position, it exerts pressure. on the spring er, and the spring in turn exerts pressure on the shoe so, tending to force this shoe against the turret A. its long as the braking surface ll) is in good condition, the stems 4-5 and 16 do not meet, but as the braking surrace il-O becomes worn, these come closer and closer together, until 1 iv meet when the braking surface .i ally worn off. it will thus be seen he spring l compensates for wear tie braking surface 4L0, that is, this spring provides almost constant pressure of the brake shoe on the truclr, regardless of the condition of the braking surface at)? it will be apparent from. the foregoing that either treadle 31 or 31- is depressed accidei'itally, as, for iainple, if it is stepped upon, one of the bra as E or IE will be set or released, according as the brake previously released or set, and such brake will then be out of tune. That is to say, if the turntable is then unoccupied, one of the brakes will be set and an automobile rolling onto the turret from the corresponding end will release the brake, whereas such automobile should set the brake. It accordingly becomes desirable to indicate at all times the condition of both of the braking devices E and E This may be accomplished by suitable means, such, for example, as the indicating device shown in Figs. 5 and 10. The device in this form comprises a pointer 66 fixed to the upper end of the shaft 50, so that it swings on the upper surface of the turret B. This pointer co-operates with two markers 67 in such manner that when the brake is released, the pointer registers with one marker or the other, whereas when the brake is set the pointer is midway between the two marks. it will be obvious that before allowing an automobile to roll onto or off from the turret B the attendant should make sure that both pointers 66 register witn one of their associated markers 67. Any other suitable form of indicating device may be substituted for the device shown in the accompanying drawings.

Although I have herein shown and described only one form of automobile turntable embodying my invention, it is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from: the spirit; and scope of my invention. Having thus described my invention, What l'claim is:

1. Aniautoinobi-le turntable comprising a truck provided with mobility Wheels, a turret revolubly mounted on said truck, and braking means for'said wheels controlledby motion of said turret with relation to said truck.

92. An automobile turntable comprising a truokprovided with mobility wheels, a turret revolubly mounted on said truck, and braking means for said wheels controlled by revolution of said turret on said truck.

-3. An automobile turntable comprising a truck provided with mobility Wheels, a turret revolubly mounted on said truck, braking means for-saidwheels, and means for rendering saidbrahing meansefiective when said turret is in one position with respect to the truck but not when the turret is in another positionwitlrrespect to the truck.

4. An automobile turntable comprising a -'truek provided with mobility wheels, a turret revolu-bly mounted on said truck, and

automatic braking means for said Wheels control-led by the posit] on ot said turret with respect to said truck.

ret revo-lubly =.1nount ed on said 1 truck and provided with a cam, and brakingimeans for saidiwheels controlled by said cam.

'6. dinautomobile turntable comprising a truck. provided with-mobility wheels, a turretrevolubly mounted on said truck, said turret beingprovided with a cam; a lever pivot-ally. mounted con w-SZI-ldl truckand pro-- vided with a rollerco-actingwith said cam,

a vbell crank ;pivotally mounted on said truck, a link connectingsaidlever and said bellicranlnxa SecondbeH-erank mounted on said truck, a vertical linl: connecting said two bell 1 cranks, braking means for K said truck wheels, and a link connecting said second bell crank with said braking means.

7. An automobileturntable comprising a truck provided with mobility wheels, a. turret =revolubly mounted on said truck and providech with acam, a follower :mounted on said truck, andbrakingmeans for said wheels controlled by said follower.

8. An automobile turntable comprising a truck provided with mobility'wheels a turret revolubly mounted on said truck, a brake for said mobility wheels controlled by the position o-ithe turret lOl'] the truck, and a brake for said turret controlled by an automobile running: onto orrofflfromthe turret.

Tn testimony whereofI afliX my signature) rRIGHAB-D B. ISEMAN. 

